VemoHerb T is consists of dry extracts of specially selected and scientifically justified combination of Bulgarian remedial plants, manufactured by "Vemo 99" Ltd., Sofia, Bulgaria. The product contains saponins, sterols, flavonoids, tannins, polyphenols and others. It acts as a natural aphrodisiac, increasing the libido and the erectile function, affects positively the volume of ejaculation, the number and motility of the sperm, stimulates the production of testosterone and fertile germ cells.
The objective of the experiment is studying the effect of the application of VemoHerb T on the reproductive performance of broiler breeders. For this purpose, 150 hens and 20 roosters at 40 weeks of age, divided into two groups were receiving standard formula for broiler parents and to feed of the test group has been added VemoHerb T of 250 g/t feed. Three times during the 95-day experimental period 260 eggs of the control group and 260 eggs of the test group were incubated: during the 11-day preparatory period, while the birds of the two groups weren’t getting VemoHerb T; one month after receiving of the product and two months after its application.
In the preparatory periods the fertility of the eggs in the control and experimental group is much close and is respectively 96.9% and 95.4%, in this indicator the groups are practically equaled. At the end of the experiment, this index began to decrease and the decreasing is greater in the control group compared to the experimental. Fertility of the eggs in the control group is 90.8%, while in the experimental group is 94.6 percent - a difference of 3.8 percentage units in the favor of the experimental group. Within the group which hasn’t been receiving VemoHerb T during the trial between the beginning and end of the experiment there was a decrease of 6.1 % units in the fertility of eggs while in the breeding flock which has been receiving from the tested product it remains virtually at the same level. At the end of the study fertility of the eggs in the group received VemoHerb T is higher by 4.2% compared to the control group.
During the preparatory period, the number of unfertilized eggs in the control group is 8 and in the test one is 12 or expressed as a percentage of the incubated eggs - respectively 3.08% and 4.62%. At the end of the experience after two months of treatment with VemoHerb T the difference in terms of unfertilized eggs between the control and test group is most pronounced: 24 pieces against 14 or 9.23% against 5.38% in the experimental birds. Therefore, the percentage of fertilized eggs in the control group increased from 3.08% to 9.23% respectively at the beginning and the end of the experiment. The results of the third incubation showed that unfertilized eggs are with 3.85 percentage units lower in the group with VemoHerb T in comparison to the control group.
During the preparatory period hatchability was 88.1% and 88.3% or practically the same in both groups. After a two-month administration of the studied product, hatchability was 86% in the control group and 89.8% in the group with VemoHerb T. While in the preparatory period the hatchability in both groups was virtually identical, in the third incubation at the end of the study after the experimental birds have been receiving the tested additive for two months, the hatchability in the experimental group was with 3.8 percentage units higher in comparison to the control.
At the end of the test period is determined the level of testosterone in the blood serum of 10 cocks of the control group and 10 cocks of the experimental group. The content of testosterone in the control group is 0.197 ng/ml and 0.255 ng/ml in the test group. The data show a 29.4% higher levels of testosterone in the group receiving for two months VemoHerb T as an additive to the combined feed of 250 g/t feed compared to the control birds.
The addition of VemoHerb T to compound feed for broiler parents for 84 days in quantity of 250 g/t feed under the conditions of the experiment increases the fertility of eggs for breeding by 4.2%, decreaces the unfertilized eggs with 3.85 percentage units, increase the hatchability with 4.4 % and the content of testosterone in the blood serum of the cocks with 29.4%.